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Antoine Pitrou authored and Sutou Kouhei committed f8c9c8bd47b
ARROW-9851: [C++] Disable AVX512 runtime paths with Valgrind Introduce a CMake option to limit the maximum dynamic dispatch SIMD level, as Valgrind is still lacking support for AVX512 instructions (https://bugs.kde.org/show_bug.cgi?id=383010). Also fix an uninitialized memory read due to GTest. Closes #8049 from pitrou/ARROW-9851-valgrind-avx512 Authored-by: Antoine Pitrou <antoine@python.org> Signed-off-by: Sutou Kouhei <kou@clear-code.com>